C++ 运算符重载之加号运算符重载

class Person {public:  Person() {};  Person(int a, int b)  {    this->m_A = a;    this->m_B = b;  }      //1.成员函数实现 + 号运算符重载  Person operator+(const Person& p) {    Person temp;    temp.m_A = this->m_A + p.m_A;    temp.m_B = this->m_B + p.m_B;    return temp;  }
public:  int m_A;  int m_B;};

void test() {
  Person p1(10, 10);  Person p2(20, 20);
  //1.成员函数方式  Person p3 = p2 + p1;  //相当于 p2.operaor+(p1)  cout << "mA:" << p3.m_A << " mB:" << p3.m_B << endl; }
int main() {
  test();
  system("pause");
  return 0;}

class Person {public:  Person() {};  Person(int a, int b)  {    this->m_A = a;    this->m_B = b;  }    public:  int m_A;  int m_B;}; //2.全局函数实现 + 号运算符重载Person operator+(const Person& p1, const Person& p2) {  Person temp;  temp.m_A = p1.m_A + p2.m_A;  temp.m_B = p1.m_B + p2.m_B;  return temp;}

void test() {
  Person p1(10, 10);  Person p2(20, 20);
          //2.全局函数方式    Person p3 = p2 + p1;  //相当于 operaor+(p1,p2)  cout << "mA:" << p3.m_A << " mB:" << p3.m_B << endl;

}
int main() {
  test();
  system("pause");
  return 0;}

class Person {public:  Person() {};  Person(int a, int b)  {    this->m_A = a;    this->m_B = b;  }    
public:  int m_A;  int m_B;};

//3.运算符重载 可以发生函数重载 Person operator+(const Person& p2, int val)  //注意全局函数的运算重载的函数名是编译器给的。{  Person temp;  temp.m_A = p2.m_A + val;  temp.m_B = p2.m_B + val;  return temp;}
void test() {
  Person p1(10, 10);  Person p2(20, 20);
  //3.运算符重载也可以发生函数重载，如下person + int  Person p4 = p3 + 10; //相当于 operator+(p3,10)  cout << "mA:" << p4.m_A << " mB:" << p4.m_B << endl;
}
int main() {
  test();
  system("pause");
  return 0;}